Semitrailer load handling machine mechanism



May 9, 1939. R. H. ZEILMAN 2,157,376

SEMITRAILER LOAD HANDLING MACHINE MECAM` Filed Feb. 5, 1937 A oy #Ze/Iman, BY @Qld H :s ATTORNEYS `ius Patented May 9, 1939 UNITED STATES PATENT OFFICE SEMITRAILR LOAD HANDLING MACHINE IVIECHANISM'.`

Roy H. Zeilman, Lorain, Ohio, assignor to Thew Shovel Company, Lorain, Ohio, a corporation of Ohio Application February 3 1937, serial No. leases Claims..

adapted to be drawn by a motor truck and morel particularly to means controlling boom move- 5 ment during travel.

Load handling machines of the semi-trailer type are adapted to be moved from one location to another by motor power furnished from a motor truck or the like rather than under `po'wer from the load handling machine itself. Although the load handling machine may be movable under its own power at the scene of operation, it is desirable, in order to expedite movement from one scene of operation to another,

that the machine be moved by independent automotive trucks. viding a. forwardly extending arm on the load. handling machine which may be pivotally secured to the rear of the motor truck with the 20 boom extending forwardly over the driving compartment of the truck. The boom will be of varying length but, in any event, will project a substantial distance forwardly of the pivotal connection with the motor truck so that, in turning, 25 the boom would extend laterally of the motor truck necessitating considerable side clearance and creating an undesirable lateral loading condition.

l lhave provided a support andguide means for the boom on the motor truck and. adjacent the driving compartment whereby the forward portion of the boom will be carried with the truck in turning and largely eliminate the vaforementioned conditions as to side clearance and loading.

provide a guide means for la boom associated with a semi-trailer secured to ,aimotor truck minimizing lateral clearance required'` for the boom when turning. s1 f l l Another object of Ymy invention is to provide a support means associated with a motor truck adapted to haul a semi-trailerwllpn which a Y boomis mounted. and whereby the support means 45 will cooperate with the normal supporting means of the boom to'maintain the boom at a desired This is usually eifected by pro- It is an vobject of my invention therefore to.

improved means for rapidly transporting a loadv -handling machine including a boom mounted on a semi-trailer. .4

v Another object of my invention is to provide asupport and guide means for a boom adapted to be quickly secured to and detached 'from a motor truck adapted to haul a load handling machine.

Other objects of my invention and the invention itself will become increasingly apparent from a consideration of the following desoriptio and drawing wherein:

Fig. 1 is a side elevational view, mainly diagrammatic, of a motor truck ad semi-trailer trailer or semi-trailer generally indicated atv I I.

Both the motor truck and trailer are preferably mounted on pneumatic tires permitting the usual truck speed when transporting the trailer I I from one location to another. The trailer II comprises a frame I2 having a forwardly extending arm I3. A superstructure including a. boom I4 is rotatably supported in the usual manner on frame I2. The elevation of the boom iscontrolled in'a well known manner by supporting cables I5 reeved through sheaves I6 at the boom outer end. The truck I0 can be turned relatively sharply but the trailer I I must turn on a curve of considerably greater radius with the result that the boom I4 would normally extend a considerable distance laterally ofthe truck necessitating considerable side clearance.

I haveprovided a support and "guide means generally indicated at I1 rigidly secured to .the truck preferably immediately behind the driving compartment I8 and having an upper saddle portion I9 adapted to receive the boom. A conventional truck I0 of this type has a chassis comprising transversely spaced and vlongitudinally extending che'inels indicated at 20,'the channels being accessible to permit generally U-form straps 2| to be disposed therearound. An angle 22 extends transversely of the truck I0 immediately behind the driving compartment and is rigidly secured to the channelsZII by projecting the ends of straps 2| through perforations provided therefor in angle 22- and threading nuts 23 thereon. Secured to angle 22 by riveting or otherwise are spaced upstanding angles 24-24 having their confronting legs perforated to form bearings for a rod 25, the rod being restrained against axial movement by pins 26-26 projected therethrough.

Plvotally mounted on rod 25 is a generally rectangular shaped frame preferably formed of upstanding angle members 21-21 having bracing members 28 and 29 secured thereto and a superposed channel member 30. Universally mounted on channel member 30 is a channel member 3|, each of vthe channel members having a bearing member associated therewith provided with generally conical bearing faces confrontingly disposed and secured by a pin 32 projected therethrough. Disposed adjacent each end of channel member 3l is a hook element 33 having an end projected through member 3| and adjustable or removable by manipulation of a bolt u.

To secure the boom in saddle I9, the hook elements I3 may be turned outwardly and the boom lowered by cables I5 to seat on channel member Il. I contemplate that the hook element 33 may be movable a substantial distance longitudinally of member 3| to accommodate booms of varying widths. The hook elements are then hooked over the lower longitudinally extending angle members of the boom indicated at 35 and tightened to maintain a secure grip thereon. The frame 2l is preferably tilted rearwardly as indicated in Fig. 1 to permit a slight elevating movement of the boom as the truck and trailer pass over uneven terrain.

During travel the superstructure is permitted to rotate thereby freely permitting lateral boom movement relative to trailer frame I2 and as controlled by the guide means I1. Since the boom is engaged by the guide means a substantial distance forwardly of the pivotal connection between 4the motor truck and arm I3, the boom will tend to follow the truck path in turning, thereby effecting rotation of the superstructure and minimizing the lateral swing of the boom outer end and considerably decreasing the side clearance required.

Upon arriving at the scene of operation, the boom is merely raised by the supporting cables and the turntable and boom may be rotated as desired.

Thus, I have provided a simple arrangement associated with a motor truck for minimizing lateral boom movement during travel permitting the truck and trailer to turn about obstructions affording relatively narrow side clearance and which forms an additional safeguard for life and property.

Although I have shown and described a preferred embodiment of my invention, I contemplate that numerous and extensive departures may be made therefrom without departing from the spirit of my invention andthe scope of the appended claims.

Having 'thus described my invention what I claim is:

1. A support for a boom during transit adapted to be detachably secured to a motor truck f comprising a frame, means for rigidly securing the frame to the truck in an upstanding'position,

the member, and the bearing surfaces permittingy limited rocking of the member relative to the pin.

2. A support for a boom during transit comprising a frame adapted to be rigidly secured to a truck in an upstanding position, an element pivotally secured to the frame to rotate about lan axis extending transversely of the truck, a mem ber adapted to grippingly engage the boom at a substantial distance from the element axis, a pair of bearing members, one associated with the member and the other with the element, and the bearing members having cooperating curved bearing surfaces whereby the member may have limited rocking action relative to the element. f

3. A support for a boom during transit by a truck comprising a frame, means forv detachably and rigidly securing the frame to the truck in an upstanding transverse position, an element pivotally secured to the frame to oscillate about an axis extending transversely of the truck at a lsubstantial distance from the element axis, a

member adapted to grippingly engage the boom, and said member being supported by the element to rotate about an axis included generally in the plane of the element and to have 'a limited universal rocking action relative to said axis.

4. A guide and support means for a boom during transit adapted to be detachably secured to a truck, comprising a generally rectangular frame,

-means for rigidly clamping the frame to the chassis in an upstanding transverse position, a

y saddle for supporting the boom, means for adjustably securing the boom to the saddle, a frame element disposed intermediate the saddle and name pivotally supported by the frame to oscillate about an axis included generally in the plane of the frame, and bearing means between the element and saddle comprising a pair of bearing elements having confronting curved bearing surfaces, one associated with the saddle and the other with the element, and a pin projected through the bearing elements and loosely engaging one of said elements whereby the saddle may rotate about the pin and have universal limited rocking action relative thereto.

5. A guide and support means for a boom during transit comprising an element adapted to be pivotally secured to a truck to rotate about an axis extending transversely of the truck, a saddle for supporting the boom spaced a substantial distance from said axis, means for securing the boom to the saddle, and a bearing intermediate the element and saddle, comprising confronting curved surfaces relatively rotatable whereby the boom may have limited universal rocking movement relative to the element. i

ROY H. ZEILMAN. 

